Irrelevant. Caps are easily reachable without the need for a racial bonus (more so as the tier progresses, higher iLvl gear with bigger stat budgets and the excess of hit/expertise on gear at the moment). The Crit is purely a bonus.

Even so, in my current gear I have Expertise at 6.01 when uncapped and Crit at 3.61.

340 x 6.01 = 2043.4
600 x 3.61 = 2166

Crit wins out in that situation (at least for my gear). Worgen is a better choice.

That doesn't matter, once you cap expertise (which you definitely will, even in blue gear) any extra will basically be reforged to mastery, which crit beats point for point up until extreme BiS gear level, and even then 600 crit is still better than 340 mastery.

Since you seem to be full of bad ideas, let me talk to you about some.

1% Crit = 600 rating.
1% Expertise= 340 rating.
1% Hit= 340 rating.
With reforging, you want as much value as you can get from stats. Thus, 600 rating > 340 rating, regardless of how you look at it, and more since Crit is high stat weight and doesn't have a reachable cap.

And, since we are talking about all warrior classes, you say 2% avoidance on a Nightelf is the best? I'd argue, at least at most gear values, 1% Expertise (or 1% hit to 7.5%) to reach 15% hard cap can outweigh 2% avoidance since it allows you to shield barrier which can be used to mitigate aoe/magic damage. Avoidance vs Damage Reduction is a case by case basis. Care to argue logically? So, not only did you inform them incorrectly on dps class, but even in your rude retort to Darkf(R)iend, you weren't accurate either.
EDIT: being less fiendish.